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文蛤染色体核型及三倍体诱导的初步研究 总被引：12，自引：1，他引：12
文蛤染色体核型及三倍体诱导的初步研究ＡＰＲＥＬＩＭＩＮＡＲＹＳＴＵＤＹＯＮＴＨＥＫＡＲＹＯＴＹＰＥＡＮＤＴＲＩＰＬＯＩＤＩＮＤＵＣＴＩＯＮＩＮＭＥＲＥＴＲＩＸＭＥＲＥＴＲＩＸ常建波魏利平杨建敏宫向红孙逢贤（山东省海洋水产研究所，烟台２６４０００）Ｃｈ... 相似文献
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“９２２Ａ”甲鱼人工配合饲料呈淡黄色粉状，粒径１５０－２００目，具有浓厚的鱼香味，做成面团状投喂在水中３—４ｈ不散。经测试：其由１７种ＡＡ组成。含粗蛋白４２．７６％，粗脂防２．４２％，钙４．３６％，磷２．３２％。历经６省（市）４年多的大面积试验，饲料系数为１．８—２．３，饲料效率为４２．３％，并有防病效果。 相似文献
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中国水产动物疾病学研究进展 总被引：25，自引：0，他引：25
中国水产动物疾病学研究进展黄琪琰（上海水产大学，２０００９０）关键词水产动物，病理学，中国ＴＨＥＡＤＶＡＮＣＥＭＥＮＴＯＦＰＡＴＨＯＬＯＧＩＣＡＬＲＥＳＥＡＲＣＨＥＳＯＮＡＱＵＡＴＩＣＡＮＩＭＡＬＳＩＮＣＨＩＮＡ￥ＨｕａｎｇＱｉｙａｎ（Ｓｈａｎｇｈａ... 相似文献
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彭泽鲫配合饲料中必需氨基酸适合量的研究 总被引：7，自引：2，他引：5
采用正交设计Ｌ９（３４）的方法,以蛋氨酸（Ｍｅｔ）、赖氨酸（Ｌｙｓ）２种必需氨基酸（ＥＡＡ）和维生素Ｃ（Ｖｃ）为试验因子,对每一种因子科学地确定３种水平,设计了９种不同配方的配合饲料,对彭泽鲫进行生长试验。结果表明：Ｍｅｔ和Ｌｙｓ为主要因子,Ｖｃ为次要因子,且以Ｍｅｔ２５５％、Ｌｙｓ４９５％、Ｖｃ１００ｍｇ／ｋｇ这一试验组的相对增重率和摄食量最大,饲料系数最低。 相似文献
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淡水养殖鱼类细菌出血性败血病药物防治研究↑（*） 总被引：9，自引：0，他引：9
通过对防治淡水养殖鱼类细菌出血性败血病的口服药物败血宁的系列实验研究表明：败血宁主药（ＢＬ）对嗜水气单胞菌（Ａｅｒｏｍｏｎａｓｈｙｄｒｏｐｈｉｌａ）的ＭＩＣ为４μｇ／ｍｌ，在剂量１０～３０ｍｇ／ｋｇ范围内进行鱼体内抗菌试验，对鲢、银鲫的预防和治疗性给药有效率皆在８０％以上，其ＬＤ５０为６１５．２ｍｇ／ｋｇ，属低毒，对鱼类较为安全；以３０、６０ｍｇ／ｋｇ的剂量口灌银鲫进行微核试验证实ＢＬ诱发红细胞微核率不明显，无潜在致突变作用。用ＨＰＬＣ法测定ＢＬ在鱼体内治疗浓度维持时间为８～９ｈ，消除半衰期ｔ（１／２β）为２．５ｈ，连续灌药３ｄ后停药５ｄ在银鲫血浆中未检测到ＢＬ的含量。以３０ｍｇ／ｋｇ的剂量进行了四年的池塘应用试验，统计有效率为９２．９％，疗效肯定。 相似文献
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蛤蟆通水库东方欧鳊移殖试验ＴＥＳＴＯＮＴＨＥＴＲＡＮＳＰＬＡＮＴＡＴＩＯＮＯＦＡＢＲＡＭＩＳＢＲＡＭＡＯＲＩＥＮＴＡＬＩＳＴＯＨＡＭＡＴＯＮＧＲＥＳＥＲＶＯＩＲ夏重志姜作发董崇智赵春刚（黑龙江水产研究所，哈尔滨１５００７０）ＸｉａＺｈｏｎｇｚｈｉ，Ｊ... 相似文献
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用偶氮磺（Ⅲ）测定甘露醇中微量硫酸根的分光光度法辛福言（中国水产科学研究院黄海水产研究所，青岛２６６０７１）关键词偶氮磺（Ⅲ），甘露醇，分光光度法ＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＴＲＡＣＥＡＭＯＵＮＴＳＳＵＬＦＡＴＥＩＯＮＩＮＭＡＮＮＩＴＯＬＵＭＢＹＩ... 相似文献
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螺旋藻对锦鲤生长和体色的影响 总被引：40，自引：1，他引：39
通过使用钝顶螺旋藻喂养锦锂试验,探讨了不同含量的螺旋藻干粉配合饵料以及活藻对锦鲁体色和生长的影响。试验结果表明在相同水温,光照和投喂量的条件下,随着螺旋藻干粉投喂量的增加,锦鲁体色越鲜艳,体重,体长也相应增加,其中鲜活螺旋藻对其色体,体长,体重影响最大。 相似文献
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Sofronios E. Papoutsoglou Elli G. Papaparaskeva-Papoutsoglou 《Aquaculture (Amsterdam, Netherlands)》1978,13(3):235-243
Three populations of rainbow trout (mean initial live weight 40 g) were fed experimentally under almost the same conditions for 49 weeks. The aim of the experiment was the examination of the changes in the relative proportions of the major whole body constituents (water, protein, fat and ash) in relation to type and amount of diet and growth rate. Two pelleted dry diets (A and B) and one mixed diet (C) were used. The amount of food given daily to the fish in the case of diets A and B was continuously based on fish body weight and water temperature. The population which received diet C (raw material and pelleted dry food) was fed on maximum ratio. Sampling was carried out approximately every two months. After 25 weeks, and besides the regular sampling, fish were sampled from each population and analyses were made on their fillets. The same analyses were also carried out. on fillets and whole body material on a sample of wild fish, of almost the same age, fed on a variety of food organisms in a stream near the experimental tanks. When the results are expressed in terms of dry weight, the analyses of whole body material showed that ash content remained fairly constant in all populations throughout the experimental time. Further, with increasing body weight and age the percentages of water and protein decreased and the percentage of fat content increased in all populations and especially in fish fed on diet C which appeared to have the maximum growth rate and final mean body weight. Similarly, fish fed on diet B, which showed the lowest growth rate and final mean body weight, had low changes in the major body constituents throughout the experimental period. The lowest and the most regular rate in the changes of these parameters appeared in fish fed on diet A which also had a sufficient growth rate and mean final body weight. Analyses of the fillets for the three different types of food used have different results. The analysed wild fish had the highest percentage of water content and, expressing the results in terms of dry weight, the highest percentage of ash and protein content, while they appeared to have the lowest percentage of fat content, on both whole body material and fillets.Since the three types of diets used in this experiment gave three different growth rates, as well as three different body compositions of the reared trout, it is suggested from the present results that the relative proportions and changes of the four body constituents and effects on the growth rate of trout are strongly affected by the type of food. 相似文献
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本文介绍了用庆丰霉素防治草、青鱼粘细菌烂鳃病的试验结果。试验表明，防治草、青鱼烂鳃病，以采用投喂口服为宜。治疗药量为每100斤成鱼每天投喂庆丰霉素(固体)半斤(含250万单位)，连投三天，有效率达96％；每100斤夏花鱼种，每天投喂1斤(含500万单位)，连投4天，有效率为72．7％。预防的投药方式和治疗剂量相同，唯应在该病流行季节之前投喂，夏花鱼种以连投7天为宜。试验表明，成鱼投药组死亡率为1．7％，对照组死亡率达27％；夏花鱼种投药组死亡率为15．7％，对照组死亡率为40．3％。 相似文献
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Dietary calcium requirement in fishes 总被引：1，自引：0，他引：1
The dietary requirement of calcium (Ca) has been well established in terrestrial animals. However, investigations for dietary Ca requirement in fish are complicated and reports limited as fish can use waterborne Ca in addition to dietary Ca. Ca absorption in fishes from environmental water is species specific and depends on concentration of Ca in rearing environment and availability of dietary Ca. Ca and phosphorus are generally combined together in fish body therefore maintaining a dietary calcium: phosphorus ratio is important. Ca exists in a complex form in fish meal, which is not available to fishes; hence, although fish meal contains an appreciable amount of calcium, dietary Ca supplementation in fish meal‐based diets for some species is necessary. This review article summarizes and discusses pertinent information on absorption of Ca from water, essentiality of dietary Ca, bioavailability of Ca from different sources, optimum calcium:phosphorus ratio and dietary Ca requirement in fishes. 相似文献
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Quality of farmed salmonids with emphasis on proximate composition, yield and sensory characteristics 总被引：6，自引：0，他引：6
R S Rasmussen 《Aquaculture Research》2001,32(10):767-786
Salmonid aquaculture has focused for many years on enhancing the quantity of fish produced. However, optimization of the quality of salmonids may lead to improved consumer acceptance and higher prices for the farmed product. The present review evaluates how the quality of salmonids is affected by parameters such as feed type, level of dietary intake (ration) and growth. Feed composition has a major influence on the proximate composition of salmonids. In particular, whole body lipid as well as the lipid content in the edible fillet is directly related to dietary fat content, while the fatty acid composition of the fish flesh is also strongly influenced by the dietary fatty acid profile. While fish body composition appears to be largely influenced by feed composition, an increase in other parameters such as feed ration and fish size also results in enhanced adipose deposition and decreased water content in the fish body. The protein content, however, remains more or less stable. An increase in fish body lipid content is not necessarily a negative factor, depending upon the processing procedure that follows. However, an increase in body fat content is generally accompanied by a reduction in slaughter yield, owing to an increase in the weight of viscera in relation to body weight. Although salmonid flesh quality with respect to levels of proximate constituents and yield appears to be under the strong influence of feed composition and feed amount, the sensory characteristics, such as odour, flavour, texture, etc., are only governed by these factors to a small degree. Tactics for the rearing of salmonids for specific purposes should therefore take into consideration the fact that the level of proximate constituents in the whole body as well as the fillet are readily manipulated by feed composition and feeding strategies, whereas the sensory parameters are less affected by these variables. 相似文献